Double-acting pump



member 37 and iny snug engagement with the inner wall of the workingbarrel 19, the sucker rod being provided with an enlargement 41providing a shoulder engaging against the boss 42 on4 the member 37 whenthe member is tightened up. The sucker rod 39 extends upwardly throughthe tubing 43 as is customary and in order to provide a tight jointbetween ,the upper end of the working barrel and the sucker rod apacking sleeve 44 is provided. he packing sleeve 4,4 has a thickened endportion 45 1 edly received within said memberllt. Acf cordingly thepacking sleeve 44 will wedge itself into position in the member 48 toprovide a tight joint between the member 48 and the packing sleeve.

Within the inner enlarged bore of lthe `packing sleeve 44 and engaging`with the shoulder 50 at one end thereof is a compressible packing 51which is held in compressed condition by engagement of the follower 52therewith, said followerbeing held yieldinglyv in engagement with thepacking member 51 by means of a kcompression coil spring 53 mountedbetween said follower and the plug 54 screw-threadedly engagingwith theinternal threads on the upper end 47 of the member 44. It will be seenthat with the arrangement of the packing sleeve described, if it isdesired to remove the piston, all that is necessary is to pull upwardlyon the same and by giving a blow to the sleeve 44 the same canbe-,dislodged from the member 48 and the sleeve and piston pulledoutwardly with the sucker rod. In a similar manner the sleeve and pistoncan be replaced, the sleeve dropping into wedging engagement with themember 48 as the same slide-s down on the sucker rod 39 into positionwithin the member 48.

The end member 11 of the pump barrel is provided with a reduced screwthreaded end portion 55 with which the sleeve 56 screw-threadedlyengages, said sleeve 56 also engaging with suitable threads on the endof the lower section of the tubing 43 to rovide a tight joint betweenthe pump barrel and said tubing.

yAn inlet chamber is provided below the partition 14 within the lowerend of the pump barrel, the same being indicated by the numeral 57.Communication is established between said inlet chamber externally ofthe tubular member 25 and that portion lying within the tubular member25 due to the perforations 26, the lower tubular end portion 27 of thekperforated tubular member 25 acting as an intake for the pump leadingfrom the screen member 30. The valve 34 provides for `communicationbetween the chamber within the working barrel 19 and the intake chamber57 when the piston is on its up stroke, as the ball 34 will then'beraised from its seat. A tubular conduit..58

is provided leading from the inlet chamber i 57 through the partition 14tothe valve member 59 which has a seat therein for the ball vvalve 60,the upward movement of the ball valve 60 being limited by the crosspin61. From said valve member 59 a tubular conduit 62 leads through theelbow 63 into the upper end of the working barrel 19, a suitableinternally screw ythreaded opening 64 being provided for receiving themember 63. Accordingly when the piston is on its down stroke the valve34 will engage its seat while the valve 60 will be raised from its seatand oil will be drawn into the cylinder above the piston. Y.

The member 11 provides an outlet chamber 65` within the same thatcommunicates with the interior of the tubing 43. A tubular conduitcomprising the elbow 66 screwthreadedly engaging in a screw threadedopening 67 in the upper end of the working barrel 19 and the tubularmember 63 extending through a suitable opening inthe partition 16, isprovided for connecting the upper end of the working barrel with theoutlet chamber, a valve member 69 having a ball valve 70 engaging with asuitable seat in said valve member and limited in its movement by thecross pin 71 being provided so that said valve will be unseated whenthey piston is on its upward stroke but will seat when the piston is onits downward stroke. A fluid tight joint is provided between the tubularmember 68 and the partition 16 by means of the compressible packingmember 72 and the nut 73 screw-threadedly engaging with suitable threadson the tubular member 68. In orderto provide a tight oint between thetubular member 53 and the par.- tition 14 a compressible member 74 isinserted between the shoulder formed by the enlargement 75 on theconduit'58 and said member 14.

A tubular conduit comprising the elbow 76 and theitubular members 77 and78 is provided for establishing communication between the outlet chamber65 and the lower end of the Vworking barrel 19. The elbow 76screw-threadedly engages with a screw threaded opening 79 in the lowerend of the working barrel, and the member 23 extends through an opening8O in the partition 16. The tubular members 77and 7 8 are con# neeted`by means of the valve memberl which is providedv with aA ball valve 82fadapted to engage with a suitableseat in the valve member'8land-:limitedin its upward movement by means of the cross pin 83. It willbe evident that when the piston is on its down stroke thevalve 82 willbe raised from its'seat to permit the oil in the working barrel to flowthrough the conduit comprising the members 76, 77 and 78 into the outletchamber 65. In order to provide a tight joint betwen the partition 16and the tubular member 78 an enlargement 84 is provided on the tubularmember forming a shoulder between which and the partition 16 iSv mounteda compressible gasket 85.

It will thus be seen that the pump is double acting and that all thevarious connections provided to obtain the double action `for the pumpare mounted within the pump barrel 10 so as to obtain a compactstructure which has no exposed parts that might be subject to injury.The pump barrel l0 is, of course, mounted in the hole 86 in the oil sand87 with thescreen 30 located near the bottom of the Well, and thetubing43 is mounted in the usual manner within ,the casing 88 which isprovided with a suitable shoe 89 that rests against the rock cap A90vthat exists above the sand 87.

What we claim and desire to secure by Letters Patent is:

1. In a pump, a pump barrel having inlet and outlet at opposite ends, aworking barrel mounted in the pump barrel and having an inlet and anoutlet, a piston operating in said working barrel, an inlet leading intoone end of said pump barrel, a partition eritending between the sidewalls of said working barrel and pump barrel near the inlet end thereofto provide a chamber in one end of said pump barrel with which saidinlet communicates andvalved inlet connections leading from said chamberto opposite ends y of said working barrel.

Y ing barrel and pump barrel near one endv thereof to provide an outletchamber therein and valved outlet connections Vextending 2. In a pump.`a pump barrelhaving an inlet, a working barrel mountedin thepump barrelhaving spaced inlets, a piston operating in said working barrel` apartition ex-y tending between theside walls ofsaid working barrel andpump barrel near one end thereof to provide an outlet chamber thereinand valved outlet connections extending from opposite ends of saidWorking barrel through said partition into said outlet chamber. f l

- 3. In a pump, a pump barrel having an inlet, a working barrel mountedin the pump barrel having spaced inlets,-a piston operating in saidworking barrel, a partition eX- tending between the side walls of saidworkbetweensaidf'barrels and throughrsaid par-k titionv intosaid outletchamber.

4. In ,a pump, a pump barrel, agworliing barrel mounted therein, apistonoperatingv insaid working barrel, an inletleading into one end ofsaidpump barrel, a partition ex tend-ing between theside walls of saidworkingbarreliand pump barrel near :the inlet end thereof to provide achamber in one end of said pump barrel with which said inletcommunicates, valved inlet connections leading from said chamber toopposite ends of said working barrel, a. partition extending betweensaid working barrel and pump barrel near the other end thereof toprovide an outlet chamber therein and valved outlet connectionsextending from opposite ends of said working barrel into said outletchamber. 5. In a pump, a. pump barrel, partitions extending across saidpump barrel near op! posite ends thereof to provide an inlet chamber atone `end of said barrel and an outlet chamber at the other 'end of saidbarrel, a.L

working barrel mounted between said partitions in spaced. relationk tosaid pump barrel and having spaced intakes, an intake leading to saidinlet chamber, a. conduit leadkworking barrel mounted between saidVartitions in spaced relation to said pump arrel, aiiintalre leading tosaid inlet chamber, a perforated tubular member extending from saidintake to, said working barrel, a conduit leading from said outletchamber, a piston operating in said working barrel. and valved conduitsleading from opposite ends of said working barrel to said outletchamber.

7. In a pump, a pump barrel, partitions extending across said pumpbarrel near'ops posite ends thereof` to provide an inlet chamber at oneend of said barrel and an outlet` chamber at the other end of saidbarrel, a working barrel mounted between said partitions in spacedrelation to said pump bai'- rel, an intake leading to said inletchamber, a perforatedtubular memberextending from said intakevto saidworking barrel, a valved inlet leading from said inlet` chamber intosaid working barrel, a conduit leading from said out-let chamber, apiston operating in said working barrel and valved yconduits leading.from opposite ends of said working barrelto said outlet chamber. l Y

p 8. In a pump', a" pump barrel, partitions extending across said pumpbarrel near opposite ends/thereof to provide an inlet cham- 'fromopposite endssof` saidworking barrel sa y pump, a pump barrel,partitions t ber at one end of said barrel and an outlet chamber at theother endv of said barrel, a Working barrel mounted bet-Ween saidpartitions n spaced relation to said pump barrel and having spacedintakes, an intake leading to said inlet chamber, a conduit leading fromsaid outlet chamber, a piston operatino in said Working barrel, one endofV sai Working barrel being flared, a tapered pac-king sleeve wedginglyengaging with said c flared end thereof, and valved conduits leadingfrom opposite ends of said Working barrel to said outlet chamber.

In testimony whereof we ax our signatures. f

CHARLES W. DANIELS. JAMES MARTIN CARPENTER.

